THE SIGM400 SERIES ENHANCED RIFLE, is designed for use in law enforcement, military operations, as well as competitive shooting. The SIG M400 is a true AR platform tactical rifle with unparalleled accuracy. A 16” Nitride treated barrel provides superior corrosion resistance, and a 7075-T6 aircraft grade aluminum forged lower receiver adds to the durability and reliability that users come to expect from SIG SAUER. FDE version is equiped with Magpul MOE forend, grip and collapsible stock. Black version is equiped with Magpul Moe forend and grip, and Ark Defense buttstock